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292 results for “Teleost”
FIGURE 2 in Zygoparity in Characidae - the first case of internal fertilization in the teleost cohort Otomorpha
FIGURE 2 | Oocyte and fertilized eggs of Compsura heterura. A. Unfertilized oocyte in ovary (follicle); B. fertilized egg in ovary (ovarian lumen) and C. gonoduct (Od); D. fertilized spawned egg. Yg, yolk granules; Ca, cortical alveoli; asterisk, chorion; Fe, follicular epithelium; N, nucleus; n, nucleoli; Y, yolk; Cc, cortical cytoplasm; Ps, perivitelline space; arrow, micropyle; Vp, vegetative poles; Ap, animal poles; In, intestine; M, muscle tissue.
Fig. 1 in Induced reproduction in a migratory teleost species by water level drawdown
Fig. 1. Photomicrographs of gonads of Astyanax altiparanae over the sampling times (stained with hematoxylin-eosin). (A) Ovary in spawning capable phase from -4h to 4h; (B) Ovary in the same phase but with post-ovulatory complexes presents in 8h and 12h; (C) Ovary in the advanced actively spawning subphase of the spawning capable phase at 16h; (D) Ovary during regressing phase from 20h to 28h; (E) Testis in spawning capable phase from -4h to 8h; (F) Testis in the advanced actively spawning subphase of the spawning capable phase at 12h; (G) Testis returning the primary spawning capable phase from 16h to 28h. In - initial oocytes; Pvt - pre-vitellogenic oocytes; Vt - vitellogenic oocytes; POC - post-ovulatory complexes; GVBD - mature oocytes (oocytes with germinal vesicle breakdown); Atr - atresias; Sc1 - primary spermatocyte; Sc2 - secondary spermatocyte; St - spermatids; Sz - spermatozoids.
Fig. 2 in Induced reproduction in a migratory teleost species by water level drawdown
Fig. 2. Quantitative analyses of the gonads. (A) Plot of female germ cells proportion though sampling times; (B) Variation in female gonadosomatic index (GSI) over the sampling times (H=16.388, p=0.037); (C) Plot of male germ cells proportion though sampling times; (D) Variation in male gonadosomatic index (GSI) over the sampling times (F=1.806, p=0.120).
Figure 4 in Impact of a large dam on reproduction of a non-migratory teleost species, Acestrorhynchus lacustris (Characiformes: Acestrorhynchidae)
Figure 4. Testis in different maturation stages and respective transversal sections stained by HE. (A) early maturation, (B) advanced maturation/mature, (C) partially spent; Z= spermatozoa; C2= secondary spermatocytes T= spermatids; ST= seminiferous tubules. Scale bars represent A= 100 µm, B= 200 µm and C= 500 µm.
Figure 3 in Impact of a large dam on reproduction of a non-migratory teleost species, Acestrorhynchus lacustris (Characiformes: Acestrorhynchidae)
Figure 3. Ovaries in different maturation stages and the respective transversal sections stained by HE.(A) resting, (B) initial maturation, (C) advanced maturation/mature, (D) partially spawned, (E) totally spawned ovaries, (F) post-ovulatory follicle, (G) yellow body. O1= early perinucleolar follicles; O2= late perinucleolar follicles; O3= pre-vitellogenic follicles; O4= vitellogenic follicles; POF= post-ovulatory follicle; YB= yellow body. Scales bars represent 100 µm.
Figure 2 in Impact of a large dam on reproduction of a non-migratory teleost species, Acestrorhynchus lacustris (Characiformes: Acestrorhynchidae)
Figure 2. Frequency (%) and size classes of vitelogenic follicles (µm) of A. lacustris from fully grown ovaries of A. lacustris. Different bar colours indicate statistically significant differences between the diameter classes (p<0.05).
Figure 1 in Impact of a large dam on reproduction of a non-migratory teleost species, Acestrorhynchus lacustris (Characiformes: Acestrorhynchidae)
Figure 1. Sampling sections of the São Francisco River, downstream from Três Marias Dam. Section 1: immediately downstream the Dam; Section 2: immediately after the confluence with Abaeté River. UTM coordinates.
Figure 1 in Tissue pH and gut ecomorphology in six freshwater teleosts occupying different trophic levels
Figure 1. The line of best fit showing the relationship between blood pH and muscle pH of the 6 freshwater fish species.
Figure 2. The relationship between relative gut length and trophic position for the 6 in Tissue pH and gut ecomorphology in six freshwater teleosts occupying different trophic levels
Figure 2. The relationship between relative gut length and trophic position for the 6 freshwater fish species. (a) Relative gut length is presented in percent of body length; (b) Relative gut length is presented in percent of total length. Averaged values of trophic position (TP) from the study by Zhang et al. (2013). Grey and black circle dots correspond to TP for stable isotope analysis (SIA) and for gut content analysis (GCA), respectively. Dashed line represents the linear fitting of relative gut length and TP for SIA, while solid line represents the linear fitting of relative gut length and TP for GCA.
Fig. 3 in Digenean parasites of deep-sea teleosts: A progress report
Fig. 3. Depth ranges of five digeneans of Coryphaenoides armatus in the NE Atlantic (adapted from Bray et al., 1999). Shaded portion shows depth range of the host, 282–5180 m, according to Froese and Pauly (2019).
Figure 3. – A in Macrozoobenthic resources use by teleosts in the Gironde estuary
Figure 3. – A: Dendrogram obtained from cluster analysis of the macrozoobenthic composition in the Gironde estuary (based on numerical percentages (%N) according to Bray-Curtis similarity); the red line indicates the threshold used by SIMPROF to separate the groups. B: Contributions (%)of the discriminating taxa in each macrozoobenthic assemblage of the Gironde estuary identified by SIMPROF determined using similarity percentage analysis (SIMPER). Cut off for low contributions: 90%.
Figure 7 in Macrozoobenthic resources use by teleosts in the Gironde estuary
Figure 7. – Ontogenetic variation of diet of Pomatoschistus minutus, Dicentrarchus punctatus, Pomatoschistus microps, Platichthys flesus and Solea solea based on numerical percentages %N of the prey phylum consumed. Dendrograms on the right were obtained from cluster analysis of the diet composition (%N) of each size class according to Bray-Curtis similarity. The red lines indicate the thresholds used by SIMPROF to separate the size classes with similarities in diet. 'TL' means total length.
Figure 2 in Macrozoobenthic resources use by teleosts in the Gironde estuary
Figure 2. – Total biomass (A) and total density (B) of macrozoobenthos species that occurred at each sampling station in July, going from downstream (left of the plot) to upstream (right of the plot) of the Gironde estuary. The colours of the diamonds at the top of each station value correspond to the macrozoobenthic assemblage they belong (Fig. 3B). See Fig. 1 for location of the stations.
Figure 6 in Macrozoobenthic resources use by teleosts in the Gironde estuary
Figure 6. – Spatial variation of diet (%N of prey phylum in the composition of diet) of Dicentrarchus punctatus, Pomatoschistus minutus, P. microps, Platichthys flesus and Solea solea (left) and that of the potential preys available in the macrozoobenthos (%N of phylum abundance at the respective stations) (right). "n.i" means "not identified". Caution: the abundance of mysids (hyperbenthic taxa) was not assessed in the intertidal area because sampling was performed at low tide.
Figure 5 in Macrozoobenthic resources use by teleosts in the Gironde estuary
Figure 5. – Dendrogram obtained according to Bray-Curtis similarity from cluster analysis of the diet composition (based on numerical percentages %N of the prey taxa consumed) of Pomatoschistus minutus, Dicentrarchus punctatus, Solea solea, Pomatoschistus microps and Platichthys flesus from the Gironde estuary. The red line indicates the threshold used by SIMPROF to separate the teleosts with similarities in diet. Pie charts on the right show the main prey taxa that contributed to the diet of each teleost species (% N). Cut off for low contributions: 90%.
Figure 1 in Macrozoobenthic resources use by teleosts in the Gironde estuary
Figure 1. – Location of the sampling stations of macrozoobenthos and teleosts in the Gironde estuary. Letters indicate the codes of the sampling stations; Intertidal stations: R = Richard, CD = Chant Dorat, M = Mortagne, StC = St Christoly, StE = St Estèphe, IM = Île Nouvelle, L = Lamarque; Subtidal stations: AvS = Aval Saintonge, AvC = Aval Centre, AvM = Aval Médoc, MaS = Maubert Saintonge, MaC = Maubert Centre, MaM = Maubert Médoc, CoS = Conac Saintonge, CoC = Conac Centre, CoM = Conac Médoc, CeS = Centrale Saintonge, CeC = Centrale Centre, CeM = Centrale Médoc, IS = Les Îles Saintonge, IC = Les Îles Centre, IM = Les Îles Médoc, LS = Lamarque Saintonge, LM = Lamarque Médoc. Main towns of the estuary are provided in the map as landmarks and are represented with black dots. 'CNPE' means 'Centre Nucléaire de Production d'Électricité'.
Figure 4 in Macrozoobenthic resources use by teleosts in the Gironde estuary
Figure 4. – Cumulative prey curves for Solea solea (n = 32), Platichthys flesus (n = 26), Dicentrarchus punctatus (n = 69), Pomatoschistus minutus (n = 220) and Pomatoschistus microps (n = 40) (preys identified to the lowest taxonomic level possible).
Figure 2 in New and rare records of teleost fishes from the Cape Verde Islands (eastern-central Atlantic Ocean)
Figure 2. ‑ First records of teleost fishes from the Cape Verde Islands. A: Gnathophis mystax, SL 365 mm, MMF39446; B: Nezumia africana, PAL 65.2 mm, MMF43121; C: Nezumia duodecim, PAL 72.8 mm, MMF39286; D: Ectreposebastes imus, SL 91 mm, MMF48816; E: Paraliparis sp., SL 251 mm, TFMC‑VP/01377; F: Lappanella fasciata, SL 140 mm, MMF42284. Scale bars = 20 mm.
Figure 1 in New and rare records of teleost fishes from the Cape Verde Islands (eastern-central Atlantic Ocean)
Figure 1. ‑ Collection locations for the first records of teleost fishes from the Cape Verde Islands: (Ì) 1: Gnathophis mystax; 2: Nezumia africana; 3: Nezumia duodecim; 4: Ectreposebastes imus; 5: Paraliparis sp.; 6: Lappanella fasciata.
Figure 1 in Metazoan ectoparasites of two teleost fish, Boops boops (L.) and Mullus barbatus barbatus L. from Algerian coast: diversity, parasitological index and impact of parasitism
Figure 1. - Number of examined specimens per size classes for Boops boops and Mullus barbatus barbatus from Béjaïa, Algeria.
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
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